Why do I need a multi-size ICO file instead of just a PNG?

Windows uses different icon sizes depending on context — 16x16 in the title bar, 32x32 on the desktop, 48x48 in folder thumbnails, 256x256 in 'Large icons' view. A multi-size ICO contains all of them in one file, so Windows always picks the sharpest size for each context.

Which sizes should my ICO file contain?

16, 32, 48, and 256 cover 99% of cases. Add 24 and 64 for Vista/7 compatibility. 96 and 128 are rarely needed but harmless. The tool defaults to 16/32/48/64/256 — uncheck any you don't need.

Can I convert an SVG to ICO?

Yes — SVGs are rasterized to PNG at each requested size before packing into the ICO. SVG source is actually the best choice because it scales sharply to every size. Drop your .svg and the tool handles the rest.

Why does my ICO look pixelated at small sizes?

Your source PNG was probably too small (e.g., 64x64) and got upscaled when generating the 256x256 size. Always start with a 256x256 or larger source. Better yet, use an SVG to avoid any quality loss.

Can I use this to make a favicon.ico for a website?

Yes — for a complete favicon set (ICO + Apple Touch + Android Chrome + manifest), use the dedicated Favicon Generator. For just a favicon.ico, this tool works perfectly.

Does ICO support transparency?

Yes — modern Windows ICO supports 32-bit color with alpha channel. Drop a transparent PNG and the transparency is preserved at every size in the output ICO.

ICO Converter - PNG / JPG / SVG to Multi-Size .ico Online

Convert any PNG, JPG, WEBP or SVG into a single multi-resolution Windows .ico file. Pick from 16, 24, 32, 48, 64, 96, 128 and 256-pixel sizes. Free, in-browser.

Drop a PNG / JPG / WEBP / SVG image

About the ICO Format

Windows .ico is a container that stores multiple PNG-encoded icons at different resolutions in one file. The OS picks the right size automatically (16×16 for the address bar, 256×256 for high-DPI). This tool re-encodes your input as PNG at each selected size, then packs them with the standard ICO directory header. Everything happens locally — your image never leaves your browser.

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Frequently Asked Questions

Upload a square PNG (256 × 256 or larger), choose the ICO sizes you need (16, 32, 48, 64, 128, 256), and download a multi-resolution .ico file ready to drop into the root of your website as favicon.ico — recognised by every browser since Internet Explorer 6.

usage

Windows desktop and shortcut icons traditionally include 16, 32, 48 and 256 pixel renditions in a single ICO so the OS can pick the right resolution per context. Modern Windows 11 prefers 256-pixel icons; older apps still need 32-pixel.

technical

Yes. Upload SVG (which scales cleanly at every resolution), JPEG or WebP and the converter rasterises each requested ICO size from the original. SVG produces the sharpest results because every size is rendered fresh from vectors.

features

Yes. Transparent PNG, SVG and WebP sources keep their alpha channel in the ICO, so the icon blends cleanly into dark and light browser tabs, Windows themes and macOS dock backgrounds.

features

favicon.ico is a multi-resolution Windows icon recognised by every browser. Apple touch icons are 180 × 180 PNG files referenced by an HTML link tag, used by iOS and iPadOS when adding the site to the home screen. Most modern sites ship both.

technical

No. Conversion runs entirely inside your browser, so your unreleased logo, beta product mark and confidential brand assets stay on your device.

privacy

Use Cases

Website Favicon for WordPress, Webflow & Next.js

Convert your logo to a multi-resolution favicon.ico that browsers display in tabs, bookmarks and history — the essential branding touch for every website launch

web

Windows Desktop Shortcut Icons

Generate proper Windows ICO files for desktop shortcuts, application launchers and custom folder icons that look sharp at 16, 32, 48 and 256 pixel resolutions

technical

Electron & Tauri Desktop App Icons

Package multi-resolution ICO files for Electron, Tauri and .NET desktop apps so the installer, taskbar icon and window chrome all display the brand mark cleanly on Windows

technical

Browser Extension & PWA Manifests

Generate the icon set Chrome, Firefox and Edge extensions need (16, 32, 48, 128) plus PWA manifest icons (192, 512) from a single SVG, ready for the web store submission

web

GitHub & GitLab Repo Avatar Icons

Convert project logos to crisp ICO and PNG assets for GitHub organisation avatars, GitLab project icons and Docker Hub repository images that scale cleanly across both platforms

technical

Static Site Generator Branding

Drop generated favicons into Jekyll, Hugo, Eleventy and Astro projects under /static so every build automatically ships browser tab branding without manual asset wrangling

web